Hormones produce their effects on target tissues by binding to specific proteins called hormone receptors located in the target tissues only. Hormone receptors present on the cell membrane of the target cells are called membrane boird receptors and the receptors present inside the target cell are called intracellular receptors, mostly nuclear receptors. Binding of a hormone to its receptor leads to the formation of a hormonereceptor complex. Each receptor is specific to one hormone. Hormone Receptor complex formation leads to certain biochemical changes in the target tissue. Target tissue metabolism and hence physiological functions are regulated by hormones.
